121510117 has 2 divisors, whose sum is σ = 121510118. Its totient is φ = 121510116.

The previous prime is 121510099. The next prime is 121510121. The reversal of 121510117 is 711015121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69655716 + 51854401 = 8346^2 + 7201^2 .

It is an emirp because it is prime and its reverse (711015121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121510117 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 121510094 and 121510103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121510157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60755058 + 60755059.

It is an arithmetic number, because the mean of its divisors is an integer number (60755059).

Almost surely, 2^121510117 is an apocalyptic number.

It is an amenable number.

121510117 is a deficient number, since it is larger than the sum of its proper divisors (1).

121510117 is an equidigital number, since it uses as much as digits as its factorization.

121510117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 70, while the sum is 19.

The square root of 121510117 is about 11023.1627494109. The cubic root of 121510117 is about 495.3028341123.

Adding to 121510117 its reverse (711015121), we get a palindrome (832525238).

The spelling of 121510117 in words is "one hundred twenty-one million, five hundred ten thousand, one hundred seventeen".